Pedal.



W. J. YAHLE.

PEDAL.

APPLICATION FILED NOV. 20, 1913.

Patented June 29, 1915.

WWAMM I BY flgmmp mm ,211 ATTORNEYS WITNESSES:

barren srarns ra'rnnr ornron WILLIAM J. YAI-ILE, DAYTON, OHIO, ASSIGNOR TO THE DAVIS SEWING MACHINE COMPANY, OF DAYTON, OHIO, A, CORPORATION OF OHIO.

PEDAL.

Specification of Letters Patent.

Patented June 29, 1915.

To all whom it may concern:

Be it known that I, WILLIAM J. YAHLE, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Pedals, of which the following is a specification.

The invention relates to improvements in pedals for bicycles and motorcycles and like vehicles, and the object is to provide a thoroughly practical so-called knockout construction, to wit, a construction which permits of the ready removal of the pedal itself from the pin or stub-shaft on which it journals. Breakage or distortion of such pins or shafts is not uncommon in the use of bicycles and motorcycles and it is of great advantage for the rider to be able to replace the broken or distorted pin or shaft and reapply the pedal himself without being put to the trouble and expense and inconvenience of having recourse to the factory or the repair shop.

In the accompanying drawings which form part of this specification, I illustrate two different forms of embodiment of my present invention.

Figure 1 shows one form of pedal construction embodying my invention, most of the parts appearing in longitudinal section; Fig. 2 is an inner end elevation of the same; Fig. 3 shows the pedal pin or shaft detached and in side elevation; Fig. 4: shows a section and end elevation of a combined cap piece and roll bearing retainer; Fig. 5 shows similar views of another combined cap-piece and roll retainer; Fig. 6 shows one of the rolls in end and side elevation and Fig. 7 shows a retaining nut in section and elevation.

Reference numeral 2 designates the pedal pin or shaft which at one end is formed with screw-threads 3 as usual for engagement with the tapped bore of the crank arm and adjacent this screw-thread portion has an enlarged flattenedv portion 4 to which a tool is applied for screwing the pin or shaft into the crank arm. At the base of this enlarged portion 4: there is formed a flange 5 which has a function to perform in the carrying out of the present invention as will presently appear. The pin or shaft extends a considerable distance in true cylindrical form, and beyond this it is turned down to a smaller diameter as shown at 7.

The pedal itself comprises the usual end plates 10 and 11 which fit shouldered portions of cap-pieces 13 and 14:,the latter having tubular portions closely fitting turnedout end portions of a central tube 16, the whole being held together by the usual bolts 17 and nuts 18, the bolts supporting rubber foot rests 19.

As before indicated the flange 5 of the pin or shaft is the particular one of the above designated parts which has to do especially with the carrying out of the present invention. In this connection it is first to be noted that the cap-piece 13 has a screw-threaded portion 21 projecting beyond the shouldered portion which receives the end plate 11 far enough to embrace the flange 5. A retaining nut 22 is screwed upon this portion of said cap-piece and is formed or provided with an inwardly-extending flange 23 somewhat closely surrounding the enlarged part 4: of the pin or shaft and thus extending over the inner side or shoulder of the flange 5 lying close up against the same when the nut is screwed home leaving just enough clearance to permit free turning of the pedal on the shaft. Obviously, removal of the pedal from the shaft is simply a matter of turning back the said retaining nut ofl' the screwthreads of the cap-piece 13.

The cap-pieces are formed so as to constitute retainers for roll bearings. Thus the flange 5 of the pedal pin has a square shoulder at the outer side, and the inner cap-piece 18 is formed with a central series of cylin drical recesses or bores 24 opening into the central space and opening out through a shouldered portion of the cap-piece, which portion thereof overlies the outer side of said flange 5. Said bores are designed to receive rolls 25 which constitute antifriction bearings running in contact with the inner portion of the pin or shaft. The cap-piece 14 is elongated in its smaller diameter, and at its inner portion is formed with a series of cylindrical recesses or bores 30 opening into the central space and out of the end of this piece, being adapted like the before-described recesses 24 of the other cap-piece. to receive antifriction rolls 31 to run in contact with the reduced outer end portion of the pin or shaft. It will be seen that this construction provides retainers for the roll bearings without increase in the number of parts making up the complete structure, though separate roll retainers might of course be used. It will further be noted that the construction provides for end thrust of the pedal inward being taken by the flange 5, this by reason of the special formation of the cap-piece 13 with the shouldered portion before mentioned as overlying the outer side of said flange. By this construction any cramping of the antifriction bearings through end thrust is avoided.

It will be noted that in the construction above described the mounting of the pedal upon its pin or shaft is a very simple matter involving merely insertion of the pin 7 through the inner end of the pedal Whose screwing of the retaining nut from the protruding screw-threaded hub portion of the pedal. It may be noted that no fastenings of any sort are required at the outer side of the pedal for the purpose of retaining it upon the pin.

I claim: V

1. In a pedal structure, the combination of a pin or shaft having an outstanding flangeat its inner portion, a pedal journaling on the shaft and having a hub portion extending inward of said flange on the outer side thereof and a separable piece engaging overthe inner side of said flange.

2. In a pedal structure, the combination of a 'pin or shaft having an outstanding flange at its inner portion, a pedal journaling on the shaft and having a hub portion extending inward of saidfl'an'ge on the outer side thereof, anda nut engaging the latter and extending. over the inner side of the shaft flange.

3. In a pedal structure, the combination of a pin or shaft having an outstanding flange at itsinner portion, a pedal journaling on the shaftand having a recessed hub portion extending inward of said flange on the outer side thereof, an interposed bearing, and a separable pieceapplied to said hub portion and engaging over theinner side of the shaft flange. v I r WILLIAM J. 'YAHLE. i/Vitnesses J, P. PARMELEE,

B, E. Brannon.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

